# 这是注释

"""
print("hello world!")#这是注释
print("hello")
"""

str = ("12345"
       "67890") #双引号定义的字符串
num = 20 + 30
str2 = ('123'
        '123')
str3 = ('''123'''
        '''123''')

print(str3)
#type 查看变量的类型
print(type(str3)) #<class 'str'>
str4 = 100
print(type(str4)) #<class 'int'>
#动态类型语言
num1 = int(input("请输入第一个数字")); # str > int
num2 = int(input("请输入第二个数字"));
print(num1 + num2)

print(2222)
#ctl+alt+L
str6 = '1234'
print(str6,sep="-")

print('--------')

# && or not and

num += 2
# if(3>1 and 5>2)

a= 2
b=3
print(a<<b)
print(a>>b)
print(a&b)
print(a|b)
print(a^b)
print(~a)